<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="/sign-in" method="post">
    username:<input name="username" type="text"><br>
    password:<input name="password" type="password"><br>
    <input type="submit" value="注册">
    <a href="/login">登录</a>
    <span th:text="${message}"></span>

</form>

</body>
</html>